Electrical timing mechanism.



F. W. ADSIT.

ELECTRICAL TIMING MECHANISM.

APPLICATION FILED 0cT.22.1915.

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.F'. W. ADSIT;

ELECTRICAL TIMING MECHANISM.

APPLICATION FILED GCT. 22. 1915.

Patented Aug. 29, 1916.

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A itorngg CIT UNITED STATES PATENT OFFICE.

FRANK W. ADSIT, OF MINNEAPOLIS, MINNESOTA.

ELECTRICAL TIMING MECHANISM.

Application filed October 22, 1915.

T all whom it may concern Be it known that I, FRANK W. Ansrr, a citizenof the United States, residing at Minneapolis. in the county of Hennepinand State of h'linnesota, have invented certain new and useful.Improvements in Electrical Timing Mechanism, of which the following is aspecification.

This invention relates to timing mechanism electrically wound and isadapted for use as an electrical clock also a part of the timingapparatus used in my co-pending application. Serial #15,11 filed March.17, 1915, and various other devices where time intervals are desired.

One object of my invention is to provide an apparatus that will becontinually operative as long as electric current is supplied to it, andwhich will open and close an electric contact at certain predeterminedintervals.

Another object of my invention is to provide means for establishing apositive contact of comparatively short duration and having the openingof the contact of comparatively long duration so that a second arytiming apparatus may be actuated through the closing of the contactwithout excessive use of current.

A further object of my invention is to provide means whereby the contactemployed may be quickly and positively o vened at the instant theopening is demande lVith these and incidental objects in view theinvention consists of certain novel features of construction andcombination of parts, the essential elements of which are set forth inappended claims and a preferred form of embodiment of which ishereinafter described with reference to the drawings which accompany andform a part of this specification.

Figure 1 discloses a front elevation of the mechanism with the contactbetween the springs 2 and 3 closed in the normal condition when theswitch 4 is opened. Fig. 2 is a front elevation of the mechanism withthe contact between the springs 2 and 3 opened, the armature having beenactuated by the coil 8, and Fig. 3 is an enlarged side elevation of aclip 30 and the insulation 31 mounted on the spring 3, to betterillustrate the means employed to make the opening of the contact of thesprings 2 and 3 positive.

lVith the mechanism in the condition dis closed in Fig. 1 with theswitch 4 closed a Specification of Letters Patent.

Patented Au". 29, 1916.

Serial No. 57,310.

current will flow from the battery 5 through wire 6 to the spring 3through the contact 1 and spring 2 through wire 7, the winding of thecoil 8, wire 9, through the switch 4: back to battery 5, thus energizingthe coil 8 and causing it to attract its armature 9 pivoted at 10 to theframe 11. the frame and armature being constructed preferably of iron.Carried by the shoulder-screw 12 the roller 13 is mounted on thearmature 9 and as the armature is attracted by the coil 8 the roller 13will ride up the cam surface 11 of the lever 15 which is pivotallymounted on the spring controlled lever 17, which in turn is pivotallymounted by the shoulder screw 18 on the f 'ame 11, the spring 19 servingto normally hold it in the position disclosed in Fig. l. The insulatedbumper 20 travels downwardly along the spring 3 the roller 13 riding onthe cam surface 14 of the lever 15 presses that lever downwardly, thelever 17 which supports it turning angularly about the shoulder screw18. The dog 21 pivotally mounted on the armature 9 at 22 and normallyheld in mesh with the ratchet wheel by the spring 24.- is carried.forward a predetermined number of teeth by actuation of the armature 9,the retaining dog 25 mounted on the frame 11 at'26 being normally heldin mesh with the ratchet wheel 23 by the spring 27. As the armature 9 isattracted by the coil 8 and moves forward the roller 13 will pass thepoint 28 of the levcr 15 and the cam surface 29 of the lever will allowthe lever 15 to turn quickly in an anti-clockwise direction, the camsurface 29 riding upwardly along roller 13, the lever 15 as a wholeturning on its shoulder screw 15., on the lever 17 and the lever 17 alsoturning slightly on its shoulder screw 18 until the position asdisclosed in Fig. 2 is reached. As soon as the point 28 has been passedby the roller 13' and the reverse motion of lever 15 starts, the bumper20 is lifted from the spring 3 allowingthe contact 1 to open and to makethe opening absolutely positive and quick, the clip 30 which is screwedto the armature 9. as better shown in 3, impinges on the insulation 31mounted on spring 3 and carries the spring 3 forward with the armature9, the bumper '32 of felt or other suitable material mounted on theadjustable stop screw 33 serving to take up the ar of the armature 9,which is preferably of considerable weight to preride sufficient inertiato render it sluggish. The backward motion of lever 15 is regulated byan adjustable stop screw 34, and

the contact 1 having been opened the armature 9 will move backward underthe influence of the main springiifi, which is adjustable by the setscrew 36. The dog 21 engaging the tooth of the wheel 23 at 37, Fig. 2,will tend to rotate that ratchet wheel in a clockwise direction and themotion will be retarded by a train of gears and escapement movements at38, which are of ordinary construction and omitted for simplicity. It isevident that as soonas the armature has traveled backward overcoming theescapement retardation to the point when the roller 13 rcpasses thepoint 28 of the lever 15 that lever will quickly swing into the positiondis closed in Fig. 1, thus closing the contact 1 and causing repetitionof the cycle which will be repeated as long as the switch 4 is closed.

it is evident that the contact 1 may be utilized not only to break thecircuit as illustrated in the drawings. but also to close circuits forsecondary timers, sign flashers, or any other suitable device.

' While I have described my invention and illustrated it in the d*awings as one particular embodiment of the invention, it is evidentthat it may be applied in many ways and I do not wish myself to beunderstood as limiting it to the particular construction and arrangementof parts as shown in the drawinns and described in the specification,but

I claim:

1. In electrical timing mechanism the combination of a coil, an armatureassociated with said coil, a dog mounted on said armature, an cscapementmovement having a ratchet wheel actuated by said dog, a roller mountedon saidarmature, a double cam shaped lever coacting with said roller,and means controlled by said double cam shaped lever for closing anelectrical contact.

2. lln electrical timing mechanism the combination of a coil. anarmature associated with said coil, a dog associated with said armature,a ratchet wheel associated with said dog, means connected with saidratchet wheel for retarding its motion, a frame for mounting saidarmature, coil and ratchet wheel, a lever pivotally mounted on saidframe, a secondary lever pivotally mounted on said first lever andhaving 2 camming surfaces, said camming surfaces meeting at a commonpoint; a roller mounted on said armature and coaeting with the twocamming surfaces of said secondary lever,

3. In electrical timing mechanism the combination of a. frame, a coiimounted on said frame, an armature mounted on said frame and adapts i tohe moved in one direction by said coil when actuated, means for makingthe return motion of said armature sluggish, an electrical contactadapted to be included in the circuit with said coil and a source ofelectrical current, an anchor shaped lever, a roller mounted on saidarmature and coacting with said anchor shaped lever and an electricalcontact controlled by the motion of said anchor shaped lever.

41. In electrical timing mechanism the combination of a frame, a coilmounted thereon, an armature mounted on said frame coaeting with saidcoil, means associated with said frame and said armature for makingthemotion of said armature sluggish in one direction, a support leverpivoted on said frame, an anchor shaped lever pivoted on said supportlever and having an arm extending therefrom, an electrical contactcontrolled in one direction by said arm extending from said anchorshaped lever, a roller mounted on said armature and coacting with saidanchor shaped lever.

5.111 electrical timing mechanism the combination of a frame, a coilmounted thereon, an armature mounted on said.

frame coacting with said coil, means for making" the return movement ofsaid armature sluggish, an electrical contact adapted to be included ina circuit with said coil and a source of electrical energy, a supportlever pivoted on said frame, an anchor shaped lever having a right andleft hand camming surface, and an arm extending from said anchor shapedlever adapted to close said contactwhen said anchor shaped lever ismoved in one direction, and to allow the opening of said contact whensaid anchor shaped lever is moved in the other direction, a rollermounted on said armature and adapted to ride on both right and left handcamming surfaces of said anchor shaped lever, said contact being closedwhile the motion of said anchor shaped lever is on one side of saidroller, and being free to open when said anchor shaped lever is on theother side of said-roller, and means attached to said arm. forpositively opening said contact when said armature is at the forward endof its stroke under the influence of said coil.

(3. In electrical timing" mechanism the combination of a coil, anarmature associated with said coil, two camming surfaces meeting at anapex and controlled by said armature, a normally opened contact, andmeans associated with said camming surfaces to close said electricalcontact when raised on one of said camming surfaces, and to allow saidelectrical contact to open when raised on the other of said cammingsurfaces.

7. in electrical timing mechanism the combination of a coil, an armatureassociated with said coil, two camming; surfaces meeting at an apex andcontrolled by said armature, an electrical contact, means associatedwith said camming surfaces to close said electrical contact when raisedon one of said camming surfaces and adapted to increase the pressure onsaid contact as it rides upwardly on said camming surface,

and additional means on said armature for quickly opening saidelectrical contact when said means for closing said electrical contactpass the apex of said camming surfaces and ride on the second of saidcamming sur-

